Everyone wants to use good solder paste and is afraid of buying inferior solder paste, which would waste time and energy. So what kind of solder paste can be regarded as good solder paste? todaySolder paste manufacturerLet me explain it to everyone:

It is very difficult to judge the quality of solder paste in the market by human eyes. Only tests can be used to determine it. Generally, the inspection is carried out in two operation steps:

I. Evaluation report after solder paste printing

Print the solder paste onPCBAfter the panel is applied, if there are various problems such as solder adhesion, insufficient adhesion, collapse, and peeling, technical process operation issues should be ruled out, that is, what problem lies with the solder paste itself.

1The main reasons for solder bonding and collapse are the imbalance and equalization of the proportion of metal components in the solder paste.

2Insufficient adhesion might also be due to the solder paste being too dry or too thin.

3The sudden appearance of the skin layer is mostly due to the fact that the solder paste is still very active.

Ii. Post-solder paste Evaluation Report

If there are no issues during printing, regular evaluation reports should also be conducted after solder paste soldering. The first step is to look for the post-weld areaPCBOn the surface of the board, it is important to observe whether there are any residues. Will there be a surface of tin beads? Will it corrode the board surface or not? Will there be any missed welds? Then test the overall one againPCBIn terms of the performance of the board, such as electrical conductivity and whether there will be a short circuit, etc.

By testing the above two operation steps, we can quickly determine whether the solder paste on our hands is good solder paste.